Sole-pressing machine



y 1930. w. c. STEWART I 1,771,019

SOLE PRESS ING MACHINE Filed Aug. 3, 1927 5 Sheets-Sheet 1 July 22,1930.

W. C. STEWART SOLE PRESSING MACHINE Filed 1927 5 Sheets-Sheet 2 July 22,1930. w, c, STEW RT 1,771,019

SOLE PRESSING MACHINE Filed Au 5, 1927 5 Sheets-Sheet 3 July22,1930. w.c. STEWART ,7

SOLE PRESSING MACHINE Filed Aug 3.. 1927 5 Sheets-Sheet 4 Flgf.

sib

Patented July 22, 1930 UNITED STATES EQATENT QFFlQi-e;

WILLIAM C. lEi'JlETKTABT.v OF S'WA'MPSCUTT, MASSACHUSETTS, ASSIGNOIR TOUNITED SHOE MACHINERY GORFORATION, OF YATERSON, NEW JERSEY, lCORPORATION OF NEW JERSEY SOLE-PRESSING IJIAGHINE Application filedAugust 3,

soles having sharp bends or angles in their surface contours, to applythedesired pressure progressively by provision for one or more intervalsof release or diminution of pressure. This enables the sole to adjustitself to its new form most advantageously, without risk ofoverstraining the sole material by a too rapid or extreme change in itsshape.

It is one object of the present invention to provide an improved machinefor shaping soles in the above-mentioned manner. In the machinedescribed herein, I have provided operating means including a clutchwhich automatically changes the direction of the "11' drive repeatedlyduring a cycle of the machine thus providing a positive alternatingforward and backward drive with consequent variations in pressure. Theconstruction illustrated comprises a controlling member which sets theclutch for forward drive when in either of two extreme positions andwhich operates the clutch to reverse the drive in passing from oneextreme position to the other. In the machine described the r versal iseifected through a latch which is operated by the controlling member asit moves from one extreme position to the other and is automaticallydisconnected when a; retrograde movement of the machine ofpre- L;determmed extent has been accomphsheu;

I have also, in accordance with another feature of the invention,provided an nnproved structure for relatively moving the pressingmembers or forms toward and from g each other.

work-receiving position and in a position 19%". Serial llO. $310,341.

under the other form. Thus the movable form is always maintained in aparallel relation to its cooperating form, and insurance is affordedthat m will be operated upon with uniform pressure.

These and other features of the invention comprising certain novelcombinations and arrangements of parts will be apparent from thefollowing description of a preferred embodiment of the invention shownin the drawings, in which Fig. 1 is a side elevation;

Fig. 2 is a frontelevation with parts broken away;

Figs. 3 and a are enlarged side elevational details ofthe link and crankmechanism;

Fig. 5 is a diagram illustrating the vari able pressure mechanism;

Fig. 6 is a detail of the driving mechanism; p

Figs. 7, 8 and 9 illustrate different positions of a part of thevariable pressure mechanism; and

Fig. 10 is a detail of the driving mechanism. The illustrated machinecomprises a base 10 on which two pairs of heavy side rods 12 aremounted. The side rods carry a cross yoke 14 from which are suspendedvertically adjustable sole pressing or so-called upper forms 16, themachine shown being a twin machine. The suspension is preferablyresilient against pressure from the lower forms or lasts 18 which aremounted on tables 20. The structure so far described is well known.

Each table 20 is pivotally mounted on two parallel links 22 of equallengths the lower ends ofwhich are pivoted on two parallel cranks 24also of equal lengths on crank shafts 26. The cranks 24L appertaining tothe same pair of links 22extend in the same direction, opposite to thatof the cranks appertaining to the other pair of links 22. Asthe crankshafts are rotatech there fore, one table 20 will rise and the otherwill fall so that as a shoe on one lower form is put under pressure ashoe on the other is released.

Mounted in the rear part of the machine is uinerent portions of the solea shaft 28 having a crank arm 30 on one end and a crank arm 32 mountednear its middle. The arm 32 is connected to the right-hand rear link 22(Fig. 2) by a link 31 (see Fig. 1). The rear crank shaft 26 has mountedat its left end (Fig. 2) a disk 36 having oppositely extending path camsand on its sides. The cam 10 engages a cam roll on the end of the arm30, and thus as the crank shafts rotate will swing the links of therighthand table forward toward the operator and backward under the upperform 16 alternately; while at the same time the cranks 26 alternatelylower and raise the lower ends of the links 22.

The cam 38 engages the end of an arm 1 mounted on a sleeve surroundingthe shaft 2 and having an arm 11 linked to the rear of the left-handlinks 22 (Figs. 2 and The operation of the left-hand mechanism issimilar but alternate to that of the right. Each table 20 has a pin 16which is arranged to enter a guide 48 in a yoke 50 mounted on the sidebars 12, as the table 2\ rises under the upper form 16. Thus the forms16 and 18 are alined properly as they come together, and the double linkand crank structure 22, 24: insures that the forms shall have the properorientation as the table 20 is always maintained parallel to a fixedplane as it moves.

The novel mechanism for driving the machine will now be described. Amotor 52 (Fig. 6) at the rear of the machine drives continuously a flywheel or clutch member 54 having an internal conical clutch face 56 anda conical boss 58. A shaft 60 bar .ig thereon a terminal clutch memberor cone 62 and a conical collar 61 like but oppositely facing the boss58, is mounted in the machine :rame. The shaft 60 has a gear member orpinion 66 mounted on it and can slide en dwise in its earings whenpushed by a yoke 68 engaging a collar 70 on the shaft and forming onearm of a bell crang 71 pivoted at 72. The other arm of the bell crank ispivoted at 7 1 to a link 76 engaging one end of a bell crank 7 8 pivotedat 80 on the machine frame. The other end of the bell crank 78 ispivoted at 82 to a link 84: the lower end of which is pivoted to an arm86 on a controlling member or treadle shaft 88 having a treadle 90 itsfront end, normally held up by a treadle spring 91. Depression of thetreadle pulls down the link 81 and turns the bell era 73 and the bellcrank 71 counter-clockwise, rorcing the cone 62 against the face 56 andclutching the shaft 60 to themotor 52.

The pinion 66 drives a ge: r 92 on a shaft 94 mounted in the frame ofthe machine and having a small pinion 96 (Fl 1) and brake drum 98 1).The brake drum 98 is em braced by brake bands 100, 102 pivoted at 16-1on the machine frame and drawn together by a bell crank 106 pivoted at108 on the band 102 and pulling on a link 110 pivoted to the band 100.The brake is tightened by a rod 112 which is pulled by a spring 11-1acting on a lever 116 to which the rod 112 is connected. The lever 116is controlled by a cam 118 on a toothed disk 120 1110111 ed on a shaft122 and driven by the pinion 16. The cam 118 is generally circular andholds the brake released except for the two opposite depressions whichallow the spring 11/1 to set it. The disk 120 rotates 180 for each machine cycle and the brake sets at the end of each cycle.

The shaft 122 carries a pinion 126 (Figs. 2 and which drives two pinions28 fast on the crank shafts 26. The pinions 126 and .128 have the samenumber of teeth, so that the angular movement of the crank shafts 26 isequal to that of the disk 120 at all times.

The means for applying interi lent pressure to the shoe and for stoppingthe machine at the end of a cycle will nou be described. The treadleshaft 33 has two more arms 130, 132 (Fig. 1) extending parallel to thearm 86. The arm 130 is linked to the has lar except for alternating lowand h1g1 1 14, 146, 118, 156 at its leading e d, and it an abrupttermination 152. 1am" such cams on the disk 120. oppos. e ranged.

The arm 132 has a notch 151inits 7), and lies directly below a leveroted at 158 on the machine frame. center of this lever hangs a pivre thelower end of which op xosi 2 the arm 132, and the middle part 1 v 160 isconnected by a l nk 162 to do lower i frame iaft 163.

of the machine by means of a Jo The upper end 167 of the lever mountedat the other end of its rock sha ft 163 and has a cam roll. 1.70 whichis arranged to ce-operate with twohumps172 on the disk 126. under thepull of a spring 17 1, which a keeps the lower end of the latch 160 pres.1 against the end of the arm 132 4 7).

hen the troadle is depr "d by the open ator the cl ch core 62 is igedwith the face 56 of the member 54. a above described, and the machinebeg ns to run. The turning of the treadle shaft also turns the bellcrank 133 clock away from the cam 142 the high point 156 of which sooncome along under the cam roll .40 and holds th treadle down, with theshalt 88 rotated from normal stopped position. a

T r turning of the shaft 88 has also dropped the end of the arm 132. Thespring 1T4 pulls the link 162 and the latch 160 so that the lower end ofthe latch 160 falls into the notch 15-; (Fig. The machine ill nulls uthe treadle as soon as the cam M2 i becomes inoperative. This raising ofthe treadle lifts the arm 182 which pushes up the latch 160 and thelever 156 (Fig. 9). i

The lever 156 (Fig. 10) extends undera rotatable and vertically slidingdownwardly spring-pressed pin 1T0, which is mounted in one arm of theyoke 68. The pin 176 has a horizontal arm 1T8 on. which is rotatablymounted a cone 180 directly between the cones 58 and 6%, but normallynot contacting with them. 3V hen the lever 156 rises as above scribed,it forces the cone 180 be cones 58 and er, forcing the shaft 00 theright (Fig. 6) and disconnecting the clutch cone 62 from the face 56.Thedriv-e is then effected through the three'cones 58, 180, 6st, and inthe opposite direction. This causes tne machine to run backwardrelieving the pressure which has been. applied up to the in stant thereversal began. This rever e movement continues until one of the lpasses under the cam roll 1T0. This bl. lever 164; clockwise 6) andthrou link 162, pushes the latch 160 off the end arm 132.

L i The pin 176 then drops under t push of its spring and releases thecones, the treadle spring 91 simultaneously raises the treadle stillfarther than the position in dicated by Fig. 9. This rotates the bellcranl. 78 clockwise and the bell crank 71 counterclockwise and engagesthe clutch cone again with the face (Rotation of the be l. crank 78 ineither direction from its mean position will engage the clutch core 62with the face 56.) The machine now drives forward until the end 1 1% ofthe other cam 1&2 comes under the cam roll 140 and forces the treadledown to normal position, thus disengaging the clutch cone 62 from theface 56.

Fig. 5 shows diagrammatically the cam cycles, the disk 120 beingregarded as 1110-.

The end of the arm 16'? passes over one of the humps 172 during theforward movement, but the resulting movement of the latch 100 isineffectual the arm 182 being then held down by the cam 142. As the roll1&0 reaches the end of its retrograde movement, the hump 1'7 2 againactuates the lever 167 and this changes the direction of the driveagain, whereupon themachine runs forward until the roll 1&0 strikes therise 1 r l1 l0 of the next 1. 12, when its stops, this movementcorresponding to the are 186.

Fig. 5 also illustrates the movements of the cranks 24;, correspondingto this cycle of movement. The circle 21 represents the position of acrank 2 1 at the beginning of the cvcle; the circle l" represents itsrosition. when the roll 1-l0 falls oil the end 2; the circle 2 1 repre:nts its position att e end the retrograde movement, which relieves thepressure so far impressed on the sole, and the circle 24 represents itsposition at the end of the cycle when the full pressure is impressed onthe sole. The initial and final positions of the cranks are 180 apart.

The arms 116 andrlgs have a pinand slot connection at 188. This enablesclockwise movement of the arm 138 (Fig. 1) to loosen the brakeat thebeginning of the cy The brake is then held loose by the cam s.- untilthe end of thecycle, while the pin and slot at 188 enables the-arm tofall past the end 1 KO iL'AJ as described.-

t ins described as new and desire to secure by Letters of the UnitedStates is: y

1. In a machine of the class described, a first pressing member, asecond pressing member, parallel links on the upper ends of which thesecond pressing member is mounted, cranks connected to the lower ends ofthe links respectively, and means for rotating the cranks to move thesecond pressing member toward the first.

2. In a machine of the class described, a first pressing member, asecond pressing member, parallel links on the upper ends of which thesecond pressing member is mounted, cranks connected to the lower ends ofthe links respectively, means for rotating the cranks to move the secondpressing niem ber toward the first, and means for swinging the links tocarry the second pressing member between work receiving and operativepositions.

3. In a machine of the class described, a first pressing member, asecond pressing member, equal and parallel links on the upper ends ofwhich the. second pressing mem ber is pivoted, parallel cranks connectedto the lower ends of the links respectively, and means for rotating thecranks and maintaining their parallelism to move the second pressingmember toward the first.

4:. In a machine of the class described, a resiliently supportedpressing member, a second pressing member, equal and parallel links onthe upper ends of which the second.

pressing member is pivoted, parallel cranks my invention, what lower thelower ends of the links, and a cam and connections constructed andarranged to swing the upper ends of the links to bring the second-namedpressing member under the first as the cranks raise the lower ends ofthe links.

5. In a machine of the class described, a resiliently supported pressingmember, a second pressing member, equal and parallel links on the upperends of which the second pressing member is pivoted, parallel cranksconnected to the lower ends of the links respectively, means forrotating the cranks and maintaining their parallelism to raise and lowerthe lower ends of the links, a cam and connections constructed andarranged to swing the upper ends of the links to bring the second-namedpressing member under the first as the cranks raise the lower ends ofthe links, and means for positively alining the pressing members as theycome together.

6. In a sole pressing machine, two pressing members arranged to press asole between them, mechanism for moving one of said members toward. theother, a driving member, and a clutch between the driving memher andsaid mechanism constructed and arranged automatically to change thedirection of the drive repeatedly during a machine cycle to effectalternate application and relief of pressure on a sole.

7. In a sole pressing machine, two press in g members arranged forrelative movement toward each other to press a sole between them, andmeans for effecting said relative movement comprising a gear memberautomatically controlled to advance in successive steps and to have aretrograde movementbetween two advancing steps in operating on eachsole.

8. In a sole-pressing machine, co-operating pressing members relativelymovable to press a sole between them, operating means comprising arotatable gear member for effecting relative movement of said pressingmembers, and automatic means to cause said rotatable gear member toreverse its movement after subjecting the sole to a preliminary pressureand thereafter by movement again in a forward direction to subject thesole to a greater pressure than that first applied.

9. In a sole pressing machine, two pressing members arranged forreciprocating relative movement toward and from each other, and adriving mechanism for effecting said movement comprising a reversibleclutch, a member arranged to setthe clutch for forward driving bymovement to each of two extreme positions and manually movable to one ofsaid posit-ions, means for holding the member in the last-mentionedposition, automatic means for moving the member to the other extremeposition, and means cooperating with the member as it moves from oneposition to the other to set the clutch for driving the machinebackward.

10. In a sole pressing machine, a pair of sole pressing members andmeans for effecting relative movement of the pressing members comprisinga clutch having two relatively movable members engageable directly toeffect forward movement of the machine, a reversing member associatedwith said clutch member to cause the clutch to drive the machine in theopposite direction, a controlling member arranged to engage said clutchmembers directly with each other by movement to either of two positions,means for latching the reversing member to the controlling member tocause movement of the controlling member from one position toward theother to move the reversing member into operative position, and meansfor unlatching the reversing member from the controlling member to causesaid controlling member to move farther toward its other position andthereby to set the clutch for further forward movement of the machine.

11. In a sole pressing machine, a pair of sole pressing members, andmeans for effecting relative movement of the pressing members comprisinga clutch having two relatively movable members engageable directly toeffect forward movement of the machine, a reversing member associatedwith said clutch members to cause the cliitch to drive the machine inthe opposite direction, a controlling member arranged to engage theclutch members directly with each other by movement to either of twopositions, resilient means for urging the controlling member toward oneposition, means for holding it in the other position after the machineis started and for releasing it at a predetermined point, a lfiLCliassociated with the reversing member and arranged to be operated by thecontrolling member as the latter moves toward the first mentionedposition after its said release, whereby the reversing member isrendered operative to reverse the drive, and means for disconnecting thelatch at a predetermined point to cause the resilient means to reengagethe clutch directly to drive the machine forward.

12. In a machine of the class described, a relatively stationarypressing member, a second pressing member, parallel links supporting thesecond pressing member, and two cranks directly connected to said linksrespectively for operating them to move the second pressing membertoward the first.

13. In a sole-pressing machine, co-operating pressing members relativelymovable to press a sole between them, driving means comprising areversible clutch for effecting relative movem nt of said pressingmembers, and automatic means for controlling said clutch to cause it toreverse the direction of the drive after subjecting the sole to apreill] iii

and automatic means to cause said clutch to reverse the direction of thedrive at a predetermined point in the sole-pressing 0peration andthereafter to resume the forward drive to complete the pressing of thesole.

In testimony whereof I have signed my name to this specification.

WILLIAM C. STEWART.

